Soapstoning device



March 17, 1931. 4L.. wETMoRE E'rAL I soAPsToNme/DEVICE Filed Apri; 27, 192e 2 Sheets-Sheet l 31M to Laufe nce We me Hefner? E. Riggs Marh 17, 11931. L, wrv-:TMoRE ET AL. `1,797,183

soAPsToNING DEVICE Filed April 27, 1928 f 2 Sheets-Sheet 2 gjm/vento@ Laurence Wemore Herbert E..Rg'gs attenua/q Patentedv Mar. 17,

- jingmaehne.

g N U STATES LAURENCE WETMORE, or ALAMEDA,cAmFoRNiA-ANDHERBERT n. mees, or AKRON, l'

OHIo,:AssIGNORs 'ro GOODYEAR Tian aan-BEER coMrA'NY, iOFiAKRorL'oHIog i f vvA- CORPORATION orY OHIO e l y Application led. April 27, Thisfinvention relates.7 generally,` to apparatus Afor'coating adhesive surfaces` with antin 'frlction'materiah and 1t has particular relationjto an apparatus ofthe above designated I"character 'for coatingvthe interior surfaceof L sociated therewith, and discharging the soapstone into aninjectorwhere it is Ysuspended Jinabla'styof air and discharged through an e`;Xft1ud'ing coref into the interior of a tube formed ,continuously by van extruding machine.; The quantity of Vsoapstone which Vis V"teppisti by theinjectof is Controlled by varying. rate of rotation ofthe screw ,con-

' Fora better' understanding ofthe inven tion; referencegm'ay now be had tothe ac-k companying drawings, forming apart of this specification, of which: Y A.

Fig v1 is a fragmentary end elevational view. of an extruding machine having a soap-- stoning device embodying one form of the invention, associated operatiyelytherewith Fig. 2isa cross-sectional view ofthe soap? stoningy device,- vtaken substantially on line Fig. l3 1s ka cross-sectional view ofl an in.

ljector embodiedginnV the soapstoning device, taken*substantially on line III-*III of Fig.

fjIn practicing the invention, amotorlO, having av Arheostat 11 for controlling the kspeed/thereof, is'supported rigidly Yupon a bracket 12 whichprojects from. one side of raljframe 13. A shaft 14 of the motor 10 is rotatably supported at one end portion there-i of remote from the motor in bearing 16 which formed in the walls of a gear' casing 17.

worm 18, rigidly'secured yon an end of the shaft 14 Yproj'ec'ting into the interior of the gear casing '17,operatively engages a worm wheel 19, which is rigidly secured on an inter'Ie'cliatev portion of a shaft 21. V Bearings l2'2faid 23,'.for1iie`d`in theV casing 17 rotatably soAPsToiviNGDEvIOE l jj;l l

Vsupportthe shaftl21 in a horiaontalplane substantially vabovethe aXisof the shaft 14, A screw conveyor 24', `formed on an end of ,edat itsopposite end in'a bearing 26 which is screw-threaded into theend offa tubular portion-27 of a basesection 28, projectingV from Y Y angd'j formed integralwith the' gear casing 17.

'lhe latter and the-base section v28 aresecured rigidly to an upper portion of the'fframe 13.

An opening 29', formed in i an 4upper portion of the tubular portion 27, communicates rwith* the `interior of Aa verticallyf'dispose'd casing or container 31, theflowerendof lwhich is surrounded 'by va flange 32 formed on an upper .portion of the base section-'28. Y

' A small spiral l'pinion 33,'jrigidlyinounted onthe shaft. 21 adjacent the kgear 19, operatiyelyengages a spiral gear34 which is? se"- .cu'red by a nut 36,1011 the lower uend' of a vertically disposed shaft 37. Al bearing 38, formed in an fupper v surface 'ofthe rgear -,casing 17, rotatably supports the shaft37 adj acent the ,spiral gear r34. The bearing. is abutted at itsupper endby a thrust ring 39 whichis secured rigidly on the shaft 37 above n thebearing.- A smallbeveled gear 41, rigidly secured upon the upper end of the shaftV 37, rests upon athrust bearing 42, "surroundi-ngv the shaft 37, vwhich issupported by a bracket' 43 that projects froma lower portion vof, a bearing block 44. Ahead v`46, to

vwhich `the block 44 is rigidly secured, has a.

flange 47 within which an upper portion vof thek casingy 31 is secured. 1 f

. 'A beveled gear 48,"operatively engaged by the beveled gear "41,-vis secured rigidly atone end of a shortyshaft 49,*which isfmounted rotatably` in the bearing-.block 44. A beveled gear 51,!rigidly secured on the opposite end ofthe shaft 49, meshes with a beveled endporti'onof a vertically disposed shaft 53.

A thrust bearing 54,'inserted betweengthe lower end ofthe gear 52and the upperv end of a bearing block 56, which is formed'fcen-` trally within thegh'ead 46, rotatably support the' upper end of the shaft53 within thecasing 31. AY vshell 45, surroundingth'e gear mechanism above the head 46 and secured gear 52, which is mounted rigidly on anfupper"A the shaft 53 within the casing31.

thereto, insures the safe operation of the mechanism. The lower end of the shaft 53 kis journaled in a bearing portion 57 of a spider 58 that is secured rigidly within the casing 31 by set screws 59. Stirring devices arerigidlyfsecured in spaced relation upon An inverted frusto-conical hopper 61, provided with a hinged closure '62 atan upper end thereof, is secured in an opening formed in the head 46.

A funnel-shape feeding hopper 64 of an injector63 is positioned directly beneath an y* opening 66 that is formed in a lower portion of the tubular member 27adjacent the end thereof remote from the opening 29. The injector 63 is supported by a bracket 60 which is secured rigidly to an upper. side portion of the frame 13. A casing 67 of the-injector 63, supporting` the funnel-shapehopper 64, is screw-threaded at opposite ends for receiving internally threaded flanged couplings 68 and 69. An opening7 2,1`fo`rmed in the casing 67,

provides communication between the interior of the latter andthe funnel-shape hopper 64. A venturi 71,l having a centrally vdisposed aperture 7 0 formed therein, is rigidly secured in the interior of the tubular member 67, between an end thereof and the flanged coupling 68. A block 73 having a centrally disposed aperture 7 4, which communicates with a space 76 between the Venturi member 71 and the tubular member 67, is likewise rigidly secured between the end of the latter and the coupling 69. A throat 77" of the Venturi member 71 is adapted to discharge a blast ofy air under pressure from the aperture vinto the aperture 74.

u `A conduit 78, communicatingwith a compressed air pump (not shown), is connected to a tubular proj eeting portion 79 of the coupling 68, through which the air under pressure is supplied to the interior aperture 70 of the Venturi member 71.

A tubular portion 81, of the coupling 69, which communicates with the aperture 74, is connected to one end of a conduit 82, the opposite end of which extends through on opening formed in a casing 83 of an eXtruding machine 84. The end of the conduit 82 is screwv threaded into an opening formed in a core 86 which is disposed centrally within the casing 83. The core 86 is supported axially .within the casing 83 ,by a spider 85 which is secured rigidly to the latter. A rubber tube 1801s extruded continuouslyby the machine 84 between the core 86 and a die 90 which vis secured by vset screws 95 to the casing83.

VA bayonet slot coupling 87, inserted intermediate theopposite ends of the conduit 82, provides means for disconnecting one portion ofthe conduit from theother. A section ,88 ofthe conduit 82, which projects within the` casing 83 of the extru'ding machine84, is provided with a vwing nut 89, rigidly secured thereto, for its convenient manipulation. The opposite end of the section 88 communi- Cates with an opening91, which i-s disposed axially within the core 86 and communicates with the space beyond the front surface of the latter.

In the operation ofthe apparatus, the casing` 31 is filled with powdered soapstone or other suitable anti-frictionmaterial through Vthe hopper 61. The.V stirring 'devices 55,

which are rotatedby the shaft 53 within the soapstone contained in the casing 31, prevent solidiication of the soapstone and facilitate its discharge through the opening 29 upon vthe slowly rotating screw conveyor 24. VSmall quantities of the anti-friction material thus are discharged through the opening 6 into the funnel-shaped member 64.

The actionV of the injector 63 causesvthe soapstone to-be drawn through the opening 72 and co-mingled with 'or suspended in the blast 'of airA discharged from the throat 77 of the yVenturi member 71. The suspended soapstone is transported through the conduit 82 and is discharged beyond the front surface ofthe core 86into`thefinterior of the tubing which is formed by the extruding machine 84. By manipulating the rheostat 11, the speed of the motor 10 and consequently the speed of the screw24 is varied at will. Thus, owingto thevariation of the speed of thescrew 2 4, any desired quantity of soa-pstone maybe discharged through the opening 66into the 1 injector63. Accordingly, the quantity of soapstone, suspended in the blast of air which isdischarged through the core 86, is varied to a nicety.

From the foregoing description, it is apparent that the invention embodies a very economicalapparatus for supplying anti-v 'friction material to the interior of rubber tubing formed by an extruding machine. Since the soapstone is supplied in variable quantities, depending on the size yand character of the tubing, a relatively great sav-V ing, in the total amount of soapstone employed overextended periods of time, is made possible. t I

Although we have illustrated only one form which the invention may assume, and

have described in detail but a single applicameans for `forcing a: blast of air through the l conduit, means K for positively ,4 feeding powdered materials to the conduit` colnpris` 7 lng a'hoppena screws1 conveyor discharging `into the hopper, a lVertical `container for powdered material disposed above'the screw Y conveyor, an individual motor geared tothe f conveyor for imparting rotational movement thereto, and a rheostatdisposed in the'ciry, cuit ofthe motor for contro11ing-the speed of rotationof the latter;

vIn Witness whereof, 'We' have hereunto 1 signed ournames.

LAURENCE WETMoEE. HERBERT E. mees. 

